te<template>
  <div class="login_wrap">
    <div class="login_box">
      <div class="avator_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
        <el-form ref="loginFormRef" :model="form" :rules="LoginFormRules" label-width="0px" class="login_form">
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input  v-model="form.username" prefix-icon="iconfont icon-user"></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input  v-model="form.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
       </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'app',
  data(){
   return {
      form:{
        username:'admin',
        password:'123456'
      },
      //这是表单的验证规则
      LoginFormRules: {
        username:[
          { required: true, message: '请输入登录名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
   }
  },
  methods:{
    //点击重置登录表单
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields()
    },
    login(){
      //表单预验证
      this.$refs.loginFormRef.validate( async valid=>{
        if(!valid) return;
        const {data: res} = await this.$http.post('login',this.form)
        if(res.meta.status != 200){
          return this.$message.error("登录失败")
        }else{
          //将登录成功之后的token保存到客户端的sessionStorage,除了登录登出其他接口需要token
          window.sessionStorage.setItem("token",res.data.token)
          //通过编程式导航跳转到后台主页
          this.$router.push("/home")
          return this.$message.success("登录成功")
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>
  .login_wrap {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%)
  }

  .avator_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background: #fff;
    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background: #eee;
    }
  }

  .btns{
    display: flex;
    justify-content: flex-end;
  }

  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box
  }
</style>>
